交互分析，要根据分析变量的类型选择方法。
两个变量都是分类变量不合适进行多元线性回归，方差分析可能更合适。
两个连续变量可以将乘积项做为新变量。
一个分类一个连续，记不太清了，可以找文献看看。

太好了，非常感谢。

不用客气！

请问楼主，在SPSS中 回归  线性   怎么设置自变量之间的交互效应啊

if a & b are both continuous variables, you should center them first to reduce multicollinearity (the correlation between a & a*b, and b & a*b), and get centered_a and centered_b. Then you compute centered_a*centered_b, and finally regress Y on centered_a, centered_b and centered_a*centered_b.

Hope this helps, mate.

** sorry that I am a Chinese who have been living overseas for years.... I can read Chinese characters but cannot write/ type.